28023323 has 4 divisors (see below), whose sum is σ = 28062288. Its totient is φ = 27984360.

The previous prime is 28023311. The next prime is 28023337. The reversal of 28023323 is 32332082.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32332082 = 2 ⋅16166041.

It is a cyclic number.

It is not a de Polignac number, because 28023323 - 2¹⁰ = 28022299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28023343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18383 + ... + 19848.

It is an arithmetic number, because the mean of its divisors is an integer number (7015572).

Almost surely, 2^28023323 is an apocalyptic number.

28023323 is a deficient number, since it is larger than the sum of its proper divisors (38965).

28023323 is an equidigital number, since it uses as much as digits as its factorization.

28023323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38964.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 28023323 is about 5293.7059797461. The cubic root of 28023323 is about 303.7431861275.

The spelling of 28023323 in words is "twenty-eight million, twenty-three thousand, three hundred twenty-three".